FILE PHOTO: Bulgarian-born artist Christo Vladimirov Yavachev, known as Christo,

FILE PHOTO: Bulgarian-born artist Christo Vladimirov Yavachev, known as Christo, attends a news conference during the presentation of the installation ‘The Floating Piers’, on the Lake Iseo, northern Italy June 16, 2016. REUTERS/Stefano Rellandini